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Ref Type Journal Article
PMID (27136102)
Authors Tsimafeyeu I, Ludes-Meyers J, Stepanova E, Daeyaert F, Khochenkov D, Joose JB, Solomko E, Van Akene K, Peretolchina N, Yin W, Ryabaya O, Byakhov M, Tjulandin S
Title Targeting FGFR2 with alofanib (RPT835) shows potent activity in tumour models.
Journal Vol Issue Date Pages Journal Short Title
European journal of cancer (Oxford, England : 1990) 61 2016 07 20-8 Eur J Cancer
URL
Abstract Text Alofanib (RPT835) is a novel selective allosteric inhibitor of fibroblast growth factor receptor 2 (FGFR2). We showed previously that alofanib could bind to the extracellular domain of FGFR2 and has an inhibitory effect on FGF2-induced phoshphorylation of FRS2α. In the present study, we further showed that alofanib inhibited phosphorylation of FRS2α with the half maximal inhibitory concentration (IC50) values of 7 and 9 nmol/l in cancer cells expressing different FGFR2 isoforms. In a panel of four cell lines representing several tumour types (triple-negative breast cancer, melanoma, and ovarian cancer), alofanib inhibited FGF-mediated proliferation with 50% growth inhibition (GI50) values of 16-370 nmol/l. Alofanib dose dependently inhibited the proliferation and migration of human and mouse endothelial cells (GI50 11-58 nmol/l) compared with brivanib and bevacizumab. Treatment with alofanib ablated experimental FGF-induced angiogenesis in vivo. In a FGFR-driven human tumour xenograft model, oral administration of alofanib was well tolerated and resulted in potent antitumour activity. Importantly, alofanib was effective in FGFR2-expressing models. These results show that alofanib is a potent FGFR2 inhibitor and provide strong rationale for its evaluation in patients with FGFR2-driven cancers.

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